title: Mid-infrared laser filamentation in molecular gases.
abstract: We observed the filamentation of mid-infrared ultrashort laser pulses (3.9 μm, 80 fs) in molecular gases. It efficiently generates a broadband supercontinuum over two octaves in the 2.5-6 μm spectral range, with a red-shift up to 500 nm due to the Raman effect, which dominates over the blue shift induced by self-steepening and the gas ionization. As a result, the conversion efficiency into the Stokes region (4.3-6 μm) 65% is demonstrated.
authors.forename: D
authors.initials: D
authors.lastname: Kartashov
authors.forename: S
authors.initials: S
authors.lastname: Ališauskas
authors.forename: A
authors.initials: A
authors.lastname: Pugžlys
authors.forename: A
authors.initials: A
authors.lastname: Voronin
authors.forename: A
authors.initials: A
authors.lastname: Zheltikov
authors.forename: M
authors.initials: M
authors.lastname: Petrarca
authors.forename: P
authors.initials: P
authors.lastname: Béjot
authors.forename: J
authors.initials: J
authors.lastname: Kasparian
authors.forename: J-P
authors.initials: JP
authors.lastname: Wolf
authors.forename: A
authors.initials: A
authors.lastname: Baltuška